Improvement in grease-arresters for sinks



W T AIK 2Sh0ets-Sheet 1.. Grease-Arresters for Sinks.

No 200,012. Patent ed Feb. 5,1878.

INVENTOR.

ATTORNEYS N-PETERS, PNOTO-LITHOGRAPHER. WASHINGTON. D C.

2 Sheets8heet 2;.

W. T. AIKI-NS. Gre ase-Arresters for Sinks.

No. 200,012. Patented Feb. 5, .1878.

INVENTOR.

ATTORNEYS N PEI'ERS. FHOTO-IJTHOGRAPHER, WASHINGTONv D (I.

UNITED STATES PATENT O FIOE.

WILLIAM THOMAS AIKINS, or TORONTO, ONTARIO, CANADA.

IMPROVEMENT IN GREASE-ARRESTERS FOR SINKS.

Specification forming part of Letters Patent N0. 200,012, dated February5, 1878; application filed January 24, 1878.

To all whom it may concern:

Be it known that I, WILLIAM THOMAS AIKINs, M. D., of Toronto, in theProvince of Ontario, Dominion of Canada, have invented certain new anduseful Improvements in Grease-Arresters for Sinks; and I do herebydeclare the following to be a full, clear, and exact descriptionthereof,reference being had to the accompanying drawings, and to the let ters ofreference marked thereon.

My invention relates to kitchen and similar sinks; and it consists inthe construction and arrangement of a grease-arrester for the same,formed by extending the sides of the sink downward to form a chamberbelow the sink, the bottom of the sink proper being hinged, and formingthe cover for said chamber 5 and in providing such chamber with anautomatic drain-pipe; and in the construction and combination of parts,as will be hereinafter more fully set forth, and pointed out in theclaims.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawings, whichform a part of this specification, and in which- Figure 1 is aperspective view of a sink embodying my invention, and showing one formthereof. Fig. 2 is a longitudinal vertical section of the same. Fig. 3is a perspective view, showing another form of my invention. Fig. 4 is alongitudinal vertical section of the same.

A represents a vessel of suitable dimensions, made of cast-iron or othermaterial, and, preferably, in the angular tapering form shown in thedrawing, and provided around the upper edge with a flange or rim. Asuitable distance below the top of this vessel is hinged a plate, B,which, when let down, rests upon suitable lugs a a inside of saidvessel. This plate thus divides the vessel into an open upper chamber,A, which is the sink proper, and a closed lower chamber, A which formsthe g'rease-arrester. In other words, the sides of the sink are extendeddownward to form the lower chamber, and the bottom B of the sink ishinged, and forms the cover for said lower chamber. In the hinged bottom"B, at or near one end, is made the usual depression I), withperforations to form the strainer, and

below the same, to the under side of said bottom, is attached a shieldor guard, C, over which the water flows from the sink into the'reasearrester A therebv )reventin an a: 7 c a splashing of the water.

D represents an upwardly-bowed pipe, one end of which enters the chamberor greasearrester A at or near the bottom, and has a strainer, 0, overit, as shown in Fig. 2, and the other end of said bowed pipe is toconnect with the usual drain-pipe.

As a regular siphon would not answer, for reasons that will behereinafter explained, I provide the bowed pipe D at the top of its bendwith a short pipe, D, for the admission of air. It is obvious that byclosing this tube D with a cork, or by other suitable means, the pipe Dwill be converted into a siphon, and that by means of said tube andsuitable removable stopper the operator can secure the the benefits of asiphon at will.

The water thrown into the sink will pass directly into the lower chamberA where it will remain and rise, and also rise in one arm of the bentpipe D until it reaches the bend of said pipe, when any excess abovethis point will be automatically drawn 011' from the bottom of thechamber A As soon as the water in the chamber A sinks to or below thebend in the pipe D the outflow at once ceases, leaving a certainquantity in the chamber. As all grease and fatty matter will rise to thetop of the water in the chamber A and the water is drawn off from thebottom only, it will readily be seen that the grease is thus arrested,and can be collected at any time when desired.

I am fully aware that grease-arresters have been made with a regularsiphon to draw off the water; but in such cases all the water, includingthe grease, is liable to be drawn off, while with my invention thiscannot be done, as the water will always stand at a certain height inthe chamber unless the air-inlet D be stopped up, when, of course, thepipe D becomes a regular siphon, and draws off all the water just thesame as in the cases referred to.

WVhen it is desired to clean out sediment, 850., from the bottom of thegrease-arrester, the lid B is raised and such sediment scraped up; orthe grease-arrester may be provided with an outlet-pipe at the bottom,with suit able stop-cock, through which the sediment can be washed out.

To prevent servants from emptying the chamber A to save the trouble ofcollecting the grease, I provide a hinged cover, F, to go over the endof the air-inlet D, and fasten the same with a suitable lock, E. Thiscover is so constructed that, while it gives free ingress to the air, itabsolutely prevents anybody from stopping up said air'inlet, whichwould, as stated, convert the pipe D into'a regular siphon.

In some cases I may divide the lower chamber or greasearrester into twocompartments, A and A*, by means of a vertical cross-partition, H. Inthis case the bottom of the sink proper is made in two parts, B and Bthe part B being hinged and covering the compartment A This part B isprovided with the strainer 12 and shieldO. The part B covers thecompartment A, and is made to slide in suitable ways, as shown, and ithas at its 7 junctionwith the part B a downwardly-pro jecting flange, t,to direct any water that may pass down at this point into thecompartment A The water passes first into the compartment A", and fromthence through openings .00 (one or more) in the lower end of thepartition H into the compartment A The grease collects at the top of theWater in the compart ment A, and the water stands in both compartmentslevel with the drain-pipe I.

J is a pipe, with stop-cock K, for entirely emptying thegrease-arrester. If desired, the grease-arrester or lower chamber may ineither case be made entirely separate from the sink proper, and placedunder an ordinary sink.

The bent pipe D, with its air-inlet D, may be applied to any suitablevessel, and arranged below the ordinary kitchen-sink or other place.

In some cases I may omit the hinged lid or lids altogether, and make thesink and greasearrester all in one vessel or chamber.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The vessel A, with hinged plate 13, forming a sink, A andgrease-arresting chamber, A", said chamber being provided with theupwardly-curved pipe D, having tube D, adapted to be opened or closed atwill by a cork or other suitable means, substantially as and for "W. T.AIKINS, M. D.

Witnesses:

D. D. WRIGHT, M. 1)., WILLIAM AIKINs.

